Because he had/has hair algae problems and was asking about cheaper optionsWhy use GFO at all? What kind of phosphate levels are you currently dealing with? I find that GFO strips too much from the tank water and haven't used it since I started the tank. Same applied to the carbon. Mushrooms and the corals that you currently have in the tank don't actually mind richer waters.
Hang on back skimmer would really help you out.I believe I was measuring 0 nitrates because the algae was consuming it.
I agree with water getting stripped. I bleached and/or killed an acro using too much phosguard.
My only defense against algae is an ac50 hob... and snails. No sump. No skimmer. Trying to maintain and increase coralline spread.
I once tried a seachem combo of matrix carbon, purigen, and phosguard. If I'm doing weekly water changes, I want it to be as simple as possible. With chemi pure elite there's no measuring. No refilling media bags. Just one rinse and it's ready.
So after reading this I took my carbon and GFO out. My montis had been super pale, tried moving their positions, tried correcting potassium, tried a new salt mix (Fritz) and larger water changes to replenish anything missing. Potassium helped the plating orange monti but not the digitata. But every day since removing the carbon/GFO the corals have colored up a little more. Only problem is husband complained that the fish tank has a "smell" now... maybe I'll add a little carbon back...Why use GFO at all? What kind of phosphate levels are you currently dealing with? I find that GFO strips too much from the tank water and haven't used it since I started the tank. Same applied to the carbon. Mushrooms and the corals that you currently have in the tank don't actually mind richer waters.